Pump



June 29 1926.

PUMP

FildJuly 14. 1925 Iii v g I INVENTOR Edward I Street ATTORNEY ablefastenings.

Patented J une- 29, 1926.

UNITED STATES EDWARD T. STREET, OF BOUNDBROOK, NEW JERSEY.

PUMP.

Application filed July 14, 1925.

This invention relates to improvements in pumps of the type havingreversely rotating impellers, which type of pump is commonly used inpumpingasphalts and like viscous substances.

When pumps'of that type are employed in this difficult work, the surfaceor lining of the impeller-chamber tends to wear out rapidly due to thefact that such substances usually contain impurities of a gritty naturethat have an abrasive action thereon.

The objects of this invention is to improve the efficiency andserviceability of such pumps by providing a construction having aneasily replaceable lining for the inipeller-chamber, large inductionports, and a tapered eduction port.

I attain these objects, as Well as others not specifically stated, bymeans of the construction and arrangement of parts hereinafter describedand illustrated in the accompanying drawings, in which:

Figure 1 is a vertical section on the line l1 of Fig. 2, showing theimpeller-chamber lining plates partly broken away.

Fig. 2 is a vertical section on the line 2-2 of Fig. 1, and,

Fig. 3 is a detail view of a set of lining plates for theimpeller-chamber.

It is to be understood that modifications in the details hereindisclosed may be made within the scope of the invention.

Referring now to the drawings, 1 is the base to Which is bolted orsecured the lower half 2 of the pump casinmnThe ipper half 3 of thecasing is detachably secured to the lower half by means .of bolts orother suit- Both halves of the casing are formed with double, spaced,walls that provide a steam jacket 4 about the casing. The steam jacketis so formed as not to afford any water pockets, and it is provided withsuitable pipe connections and ports for circulating steam therethrough.

Oppositely disposed induction ports 5 are Serial No. 43,461.

formed in the lower half of the casing, and a central tapered eductionport 6 in the upper half.

A pair of impellers 78, preferably made of tool steel, are mounted inthe impellerchamber 9 of the pump casing. One of the impellers, whichhave intermeshing teeth, is mounted on a driving shaft 10 and the otheron a driven shaft 11 so as to rotate in opposite or reverse directions.

Lining plates 12, preferably made of tool steel, are inserted in thepump casing at both sides of the impeller-chamber 9. The plates, one setof which is shown in detail in Fig. 3, are made in halves provided withopenings 13 to accommodate the impeller shafts, and are shaped toconform to the sides of the chamber 9. In assembling the pump the lowerhalves of the two sets of plates 12 are placed in thelower part 2 of thecasing and the upper halves in the upper part 3 thereof, the two partsof the casing are then bolted or fastened together. When the liningswear they can be easily removed and replaced with new ones at arelatively slight cost.

What I claim is In a pump of the impeller type, a casing composed of anupper and a lower part detachably secured together to form an impellerchamber, a pair of impellers having intermeshing teeth in the chamber,shafts on which the impellers are mounted, and a pair of relativelyseparable and replaceable lining plates in each side of the chamber,each plate having a pair of semi-circular openings to receive theshafts, said openings of the respective plates being in register, theplates having their inner side edges meeting along lines passing throughthe centers of the shafts, whereby to allow the plates to be applied andremoved by lifting removal of the upper part of the casing and of theimpellers and their shafts.

EDWARD T. STREET.

